Pteridospermales

views updated May 08 2018

Pteridospermales (seed ferns) Extinct gymnosperm order, which were the earliest seed plants and flourished in the Carboniferous, before disappearing in the Cretaceous. Their foliage was fern-like in appearance, but the fertile leaves bore seeds and pollen-producing organs. The first plant to be identified (in 1903) as a seed plant rather than a true fern was Lyginopteridales oldhamia.

Pteridospermales

views updated Jun 08 2018

Pteridospermales (seed ferns) An extinct gymnosperm order, containing the earliest seed plants, which flourished in the Carboniferous, before disappearing in the Cretaceous.

Pteridospermales

views updated May 11 2018

Pteridospermales See Cycadofilicales.